DKFL NA 6914 Needle Roller Bearing
The DKFL NA 6914 belongs to the family of machined needle roller bearings with flanges and a separate inner ring. It is designed for a 70 mm shaft diameter, with a 100 mm outside diameter and a substantial 54 mm width. Compared with the narrower 49 series, the 69 series has a wider cross-section, allowing it to support heavy radial loads when the shaft and housing are properly designed and the bearing is correctly lubricated.
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Product Detail
Needle Roller Bearing DKFL NA 6914 Machined Needle Roller Bearing with Inner Ring | 70 mm Shaft Diameter | Extra-Wide Industrial Design
Designed to deliver high radial load capacity within a compact cross-section, the DKFL NA 6914 features a hardened machined inner ring, precision needle rollers, and a lubrication groove and holes for demanding industrial applications. Supplied by Kamyar Gostar Iranian (KGICO).
Technical Overview of the DKFL NA 6914 Needle Roller Bearing
The DKFL NA 6914 belongs to the family of machined needle roller bearings with flanges and a separate inner ring. It is designed for a 70 mm shaft diameter, with a 100 mm outside diameter and a substantial 54 mm width. Compared with the narrower 49 series, the 69 series has a wider cross-section, allowing it to support heavy radial loads when the shaft and housing are properly designed and the bearing is correctly lubricated.
The hardened and ground inner ring provides a suitable raceway surface for applications where the shaft itself is not hardened and ground to bearing-raceway requirements. The outer ring is specified with a circumferential lubrication groove and lubrication holes to help deliver lubricant to the needle rollers. Confirm the exact configuration against the product drawing or manufacturer’s catalogue before ordering.
Bearing Designation and Code Overview (DKFL NA 6914)
NA designation: Identifies a machined needle roller bearing with an inner ring. Exact suffix and construction details should be checked in the manufacturer’s catalogue.
Dimensional series 69: Indicates the bearing’s dimensional series and width category. Do not infer load capacity from the series designation alone; use the manufacturer’s rated data.
Size code 14: For this bearing, the nominal bore is 70 mm. The complete dimensions should be verified against the applicable product drawing or catalogue.
Lubrication features: A groove and lubrication holes are specified for the outer ring; verify their position and configuration before installation.
DKFL: The brand under which this bearing is offered by Kamyar Gostar Iranian (KGICO).
Technical Specifications and Dimensions
| Bore (d) | Outside Diameter (D) | Overall Width (B) | Rolling Element | Inner Ring | Lubrication | Approx. Weight | Material |
|---|---|---|---|---|---|---|---|
| 70 mm | 100 mm | 54 mm | Needle rollers | Included; hardened and ground | Outer-ring groove and lubrication holes; verify configuration | Verify with manufacturer | Bearing steel; confirm exact grade with manufacturer |
Note: Weight, steel grade, cage design, and detailed lubrication features can vary by manufacturer or product variant. Confirm these values using the current DKFL product documentation before publication or procurement.
Engineering Comparison: NA 6914 and Other Needle Roller Bearing Options
The following dimensions and construction details are indicative. Verify the applicable manufacturer’s catalogue before selecting or replacing a bearing.
| Bearing Designation | Dimensions (d × D × B) | Inner Ring | Radial Load Capacity | Key Design Consideration |
|---|---|---|---|---|
| NA 6914 (DKFL) | 70 × 100 × 54 mm | Included | Use manufacturer’s rated data | Wide bearing design; confirm load ratings, speed limits, and fit requirements |
| NA 4914 | 70 × 100 × 30 mm* | Included | Use manufacturer’s rated data | Narrower design may suit applications with limited axial space |
| RNA 6914 | Check catalogue | Not included | Use manufacturer’s rated data | Requires a suitable hardened and ground shaft raceway; dimensions differ from the NA version |
*The NA 4914 dimensions shown are commonly listed values; confirm the exact dimensions and suffix for the intended manufacturer and variant.
Key Features and Potential Advantages of the DKFL NA 6914
Wide 54 mm Design
The wide section provides an extended bearing arrangement. Actual load capacity depends on the bearing’s internal design, operating conditions, and manufacturer’s ratings.
Separate Inner Ring
The inner ring provides the rollers with a dedicated raceway surface, which can be useful when the shaft cannot serve directly as a suitably hardened and ground raceway.
Lubrication Provision
The specified outer-ring groove and holes can support lubricant delivery. Confirm their location and align them with the housing lubrication passage where applicable.
Needle Roller Arrangement
Needle rollers provide a high radial load capacity relative to their cross-section when the bearing is correctly selected, supported, aligned, and lubricated.
Bearing-Grade Steel
Material grade and heat-treatment specifications should be confirmed from the product documentation rather than assumed from the bearing designation.
DKFL Brand
For product authenticity, availability, and technical documentation, contact Kamyar Gostar Iranian (KGICO).
Typical Industrial Applications for the NA 6914
- Industrial gearboxes and drive systems: Shaft arrangements requiring a needle roller bearing, subject to verification of load, speed, lubrication, and fit requirements.
- Industrial pumps and hydraulic equipment: Applications where the operating conditions and bearing ratings are compatible with the selected bearing.
- Steel-processing and material-handling equipment: Rotating assemblies that require compact radial support and appropriate protection from heat and contamination.
- Printing and packaging machinery: Roller and shaft assemblies where the bearing arrangement is selected for the actual operating loads and speeds.
- Industrial mixers and process machinery: Suitable only when the bearing’s load ratings, lubrication, alignment, and mounting conditions meet the application requirements.
Installation Guidelines and Engineering Notes
If the outer ring has a lubrication hole, position it in line with the housing’s lubrication passage as specified by the bearing and housing design. Do not assume the hole position without checking the product drawing.
Do not rely on this bearing to locate or support substantial axial loads unless the manufacturer explicitly specifies that capability. Use a suitable complementary bearing arrangement where axial location is required.
Handling the Separate Inner Ring and Outer-Ring Assembly
The bearing may have separable components. Follow the manufacturer’s mounting instructions, use clean tools and suitable fitting methods, and apply force only to the ring being fitted. Avoid impact loading, contamination, and tilting the shaft during assembly, as these can damage the raceways or rollers.
Frequently Asked Questions (FAQ)
1. What is the difference between NA 6914 and RNA 6914?
The NA version includes an inner ring, while the RNA version does not. An RNA bearing typically requires the shaft itself to provide a suitable hardened and ground raceway. Check the manufacturer’s catalogue for the exact dimensions and designations of each version.
2. Why is the NA 6914 wider than the NA 4914?
The NA 6914 is specified with a 54 mm width, while the NA 4914 is commonly listed with a narrower width. A wider bearing may offer a different load-carrying capability, but the actual capacity must be determined from the manufacturer’s ratings—not from width alone.
3. What lubrication is recommended for the DKFL NA 6914?
The appropriate lubricant and relubrication interval depend on speed, load, temperature, contamination, and the bearing arrangement. Select grease or oil according to the manufacturer’s guidance and the application’s operating conditions.
Request a Quote for the DKFL NA 6914 Needle Roller Bearing
Contact the Kamyar Gostar Iranian sales team to check stock availability, place bulk orders, or request product documentation and technical assistance.
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